APA Citatie

United Nations Development Programme. (2000). World resources 2000-01: People and ecosystems, the fraying web of life. World Resources Institute.

Chicago Style citaat

United Nations Development Programme. World Resources 2000-01: People and Ecosystems, the Fraying Web of Life. Washington: World Resources Institute, 2000.

MLA citatie

United Nations Development Programme. World Resources 2000-01: People and Ecosystems, the Fraying Web of Life. World Resources Institute, 2000.